Evaluation of the response to wide diameter dental implants
Research type
Research Study
Full title
Soft and hard tissue alterations after immediate placement of wide body impants in relation to insertion torque
IRAS ID
157299
Contact name
Andre Christiaan Hattingh
Contact email
Duration of Study in the UK
2 years, 9 months, 26 days
Research summary
Introduction:
Since the discovery of osseointegration, dental implants have been produced in various macroscopic shapes and sizes. Although implant length has been an obvious variable, implant width has attracted little attention, until recently.1-13 Immediate placement of dental implants following the removal of teeth, has become a commonly accepted modality in modern day implantology. However the complexity of molar sockets and the fact that molars are located in high force bearing areas make the utilization of conventional sized dental implants difficult. It has been proposed that a wider diameter implant could under certain circumstances be a valuable adjunct to our endeavors in replacing molar teeth. A limited number of studies are available on this topic and this thesis aims to address and explore some of the most important points relating to this subject.Study 1: A retrospective analysis of a 5-8 year follow-up of wide diameter dental implants.
Implants that were placed at least 5 years ago (totaling at least 100 implants) will be evaluated. Patients will be invited for a clinical examination to determine the success of the implant in terms of bone level and mucosal health, to rate the esthetic appearance and patient satisfaction and to measure the bacterial composition and immunology markers from peri-implant crevicular fluid.Study 2: A prospective study on wide diameter implants – Part 1: Clinical outcome and volumetric changes.
In this prospective study, 50 wide diameter implants will be placed in molar extraction sockets and left unloaded for 4 months. At 4 months the implants will be restored with a single crown. The final examination will take place after 1 year of loading. Peri-implant bone loss and soft tissue health will be evaluated as well as patient satisfaction and esthetic outcome. Impressions will be taken before tooth removal, at 4 months and after 1 year of function. The models will be scanned and compared to assess the changes in tissue volume over time.Study 3: A prospective study on wide diameter implants – Part 2: Effect of insertion torque on the clinical outcome.
The aim of this study would be to evaluate the influence of insertion torque on the clinical outcome of wide diameter implants. In addition, a Finite Element Analyses model will be created to support these findings.Study 4: Immediate placement and immediate loading of wide diameter implants.
The aim of this study would be to evaluate the outcome of immediately placed and immediately loaded wide diameter dental implants in molar sockets. 24 implants will be placed into fresh extraction sockets and loaded within 24 hours with a provisional crown. After 4 months, the temporary crown is replaced with a permanent crown. Outcome parameters are implant survival and success, soft tissue health, patient satisfaction and esthetic appearance.Study 5: Comparison of regular versus hybrid surface wide diameter implants.
The aim of this study would be to evaluate the outcome of 15 hybrid surface (smooth at the coronal level and rough at the middle and apical part) Max MSc implants (TEST) compared to 15 standard Max implants (CONTROL). All implants are delayed loaded and will be followed for 1 year. The outcome variables will include bone loss, implant survival, immunology, probing depths, surface analyses, insertion torque, esthetic evaluation and patient satisfaction.REC name
London - Camden & Kings Cross Research Ethics Committee
REC reference
15/LO/0214
Date of REC Opinion
27 Feb 2015
REC opinion
Unfavourable Opinion